Adriatico 4-4-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 180 (Locobase 6788)

Data from the table presented on pages 370, 372 of the Groupe VI. - GTnie civil. - Moyens de transport. DeuxiFme partie. Classes 32 (Tome I), part of the series of Rapports du Jury Internationale of the Exposition Unverselle Internationale de 1900 Paris Exposition, hosted on the website of Le Conservatoire numTrique des Arts & MTtiers ([], Accessed 21 August 2005).

This design is similar to the one described in Locobase 3672 (Gruppo 552), but has a somewhat smaller boiler. Locobase notes that the present class was credited to the Adriatic.The Jury report tells us (286-287) that the exposition locomotive was works number 468.

The boiler was fitted with Serve finned firetubes.


Class 1855 (Locobase 12516)

Data from the table presented on pages 370, 372 of the Groupe VI. - GTnie civil. - Moyens de transport. DeuxiFme partie. Classes 32 (Tome I), part of the series of Rapports du Jury Internationale of the Exposition Unverselle Internationale de 1900 Paris Exposition, hosted on the website of Le Conservatoire numTrique des Arts & MTtiers ([], Accessed 21 August 2005).

This design is similar to the one described in Locobase 3672 (Gruppo 552), but has a somewhat smaller boiler. Locobase notes that the present class was credited to the Adriatic.The Jury report tells us (286-287) that the exposition locomotive was works #468.

The boiler was fitted with Serve finned firetubes.


Class RA 180bis/Gruppo 552 (Locobase 20994)

Data from "Fouf-Wheel Coupled Passenger Locomotive; Paris Exhibition" , Engineering, Volume 70 (23 November 1900), pp 661, 664.. Works numbers were 415-426 in 1899 and 468-4479 in 1900.

Locobase 12516 describes the first few batches of this numerous two-cylinder simple-expansion design.

The boiler was fitted with Serve internally finned firetubes.

Principal Dimensions by Steve Llanso of Sweat House Media

Class1801855RA 180bis/Gruppo 552
Locobase ID6788 12516 20994
RailroadAdriaticoAdriaticoAdriatico
CountryItalyItalyItaly
Whyte4-4-04-4-04-4-0
Number in Class11012
Road Numbers18891855-18641865-1876, 1889-1900/552-013 to 552-036
GaugeStdStdStd
Number Built11012
BuilderBredaBreda
Year188718871899
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.97 / 2.43 7.97 / 2.43 8.14 / 2.48
Engine Wheelbase (ft / m)21.98 / 6.7021.98 / 6.7021.98 / 6.70
Ratio of driving wheelbase to overall engine wheelbase 0.36 0.36 0.37
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)64,485 / 29,25064,485 / 29,25064,485 / 29,250
Engine Weight (lbs / kg)108,042 / 49,000108,042 / 49,007108,026 / 49,000
Tender Loaded Weight (lbs / kg)70,548 / 32,00070,548 / 32,00070,548 / 32,000
Total Engine and Tender Weight (lbs / kg)178,590 / 81,000178,590 / 81,007178,574 / 81,000
Tender Water Capacity (gals / ML)3168 / 12
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)3 / 33 / 3 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 2754 / 2754 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)76.40 / 194076.40 / 194176.40 / 1940
Boiler Pressure (psi / kPa)198.70 / 13.70203 / 14203.10 / 14
High Pressure Cylinders (dia x stroke) (in / mm)18.9" x 23.62" / 480x60018.9" x 23.62" / 480x60018.9" x 23.62" / 480x600
Tractive Effort (lbs / kg)18,652 / 8460.4119,056 / 8643.6719,065 / 8647.75
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.46 3.38 3.38
Heating Ability
Tubes (number - dia) (in / mm)125 - 2.559" / 65125 - 2.56" / 65120 - 2.559" / 65
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.50 / 3.2010.50 / 3.2010.50 / 3.20
Firebox Area (sq ft / m2)129.17 / 12129.12 / 12129.17 / 12
Grate Area (sq ft / m2)25.51 / 2.3725.50 / 2.3725.51 / 2.37
Evaporative Heating Surface (sq ft / m2)1720 / 159.751719 / 159.761720 / 159.80
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1720 / 159.751719 / 159.761720 / 159.80
Evaporative Heating Surface/Cylinder Volume224.26224.13224.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation506951775181
Same as above plus superheater percentage506951775181
Same as above but substitute firebox area for grate area25,66626,21126,234
Power L1780579697977
Power MT533.68544.89545.44

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